Online payment, online refund.

I went to collect an online order today at Northgate. I could not be assisted with collection or a refund due to the system being offline. I sent an email to customer service requesting a cancellation and a refund, and was told I can go to the store to cancel. I paid online, I want an online refund. I am not going back there. I also want the delivery fee refunded. I was at the store. The onus is on you to assist me as the customer. Also don't list something when there's no stock of the item. I better not have been charged for that item. Refund please.